Accelerated test design is a method for evaluating product life or reliability characteristics based on a full understanding of product failure. At least the following technical details are included: ● Knowledge of all known or potential failure modes and failure mechanisms of the product; ● Acceleration methods under each failure mode of the product and the failure mechanism model required for quantitative design; ● The failure mechanism of the product in the accelerated test Criteria and detection methods. The above three aspects are the necessary conditions for the accelerated test design for the purpose of quantitative reliability evaluation, and none of them are indispensable.